EP 0383718 A3 19911127 - HEATING ELEMENT CONTROL
Title (en)
HEATING ELEMENT CONTROL
Publication
Application
Priority
US 31176889 A 19890217
Abstract (en)
[origin: EP0383718A2] A heating element control includes a ceramic substrate having a resistance circuit thereon of a material having a positive temperature coefficient. A first comparator compares the resistance of the circuit with a first known resistance to control a signal light. A second comparator compares the resistance of the circuit with a second known resistance to control a heating element.
IPC 1-7
IPC 8 full level
G01K 7/16 (2006.01); G05D 23/24 (2006.01); H05B 3/00 (2006.01); H05B 3/74 (2006.01)
CPC (source: EP)
G05D 23/1909 (2013.01); G05D 23/24 (2013.01); H05B 3/746 (2013.01)
Citation (search report)
- WO 8300574 A1 19830217 - SERVICE FIRST INTERNATIONAL LI [GB]
- DE 3049056 A1 19820909 - DRALORIC ELECTRONIC [DE]
- US 4103275 A 19780725 - DIEHL WALTER, et al
- EP 0288915 A2 19881102 - EGO ELEKTRO BLANC & FISCHER [DE]
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0383718 A2 19900822; EP 0383718 A3 19911127; EP 0383718 B1 19960424; CA 2007729 A1 19900817; DE 69026635 D1 19960530; DE 69026635 T2 19960919; JP H02254510 A 19901015
DOCDB simple family (application)
EP 90630038 A 19900208; CA 2007729 A 19900115; DE 69026635 T 19900208; JP 3711990 A 19900216